Patent GB-731043-A (GB)
Title: Device for attaching a hinged lifting door, casement window or the like to a fixed frame
Inventor: VOSTER WALTER
IPC: E06B3/52
Filed: 1953-10-07
Abstract: 731,043. Hinges, door fastenings. VEREINIGTE BAUBESCHLAG-FABRIKEN GRETSCH & CO., GES. Oct. 7, 1953, No. 27554/53. Classes 44 and 65(2). A device for attaching a door, window or the like to a fixed frame to allow the door to be lifted and to be turned about a vertical axis, comprises a hinge having a vertical hinge pin, and a lever which is operatively connected to the hinge pin and is also attached to the fixed frame on a horizontal fulcrum, the axis of which intersects or nearly intersects the axis of the hinge pin, so that the lever is movable in a vertical plane passing through the hinge axis. As shown, the hinge barrel of a member 22, secured to the door, is mounted on a hinge pin 21 and rests on a flange 47 provided on the latter. The hinge pin is received in the barrel of the hinge member 20 secured to the fixed frame 10, and is pivoted at 36 to one end of a link 41, the other end of which is pivoted at 42 to a lever 39, the latter being fulcrummed on a pin 40 carried by member 20. The arrangement is such that the lever, when turned downwardly from an upright position, in which it lies against the hinge barrels, raises the hinge pin and therewith the member 22. Pin 40 is offset a short distance e from the axis of the hinge pin, and the line joining pins 36 and 42 is arranged to pass to the fixed frame side of the axis of pin 40, in both the lowered and raised positions of the hinge pin, whereby the weight of the door retains the lever in its raised and lowered positions respectively. The member 20 is U-shaped in cross section and penetrates the frame. A plate 29, which bridges the arms of the U and is riveted or welded thereto, bears against the edge of the frame. A nose 34, provided on the hinge pin, bears between a pair of indentations 32, formed in the respective arms of the U, to prevent relative rotation between the hinge pin and member 20. The upper end of the hinge pin carries a nose 48 which overlies an indentation 50 in the barrel of member 22 when the door is closed, whereby the door must be turned to an open position before member 22 can be disengaged from the hinge pin. The terminal knob 43 of the lever may be provided with a ball catch adapted to engage in a depression formed in a plug 53 at the end of the barrel of member 22, to retain the lever in the raised position. In a modification, the lever is provided adjacent its fulcrum 40 with a pair of opposed straight edges which alternatively engage a leaf spring carried by member 20, whereby the lever is retained in both the raised and lowered positions. In a further modification the hinge pin is made in two parts, the upper of which is slightly less in diameter than the lower and screws into the latter, while a head provided on the upper part overlies the adjacent hinge barrel. In a final modification, the arms of the U-shaped part of the fixed member are secured to a plate which abuts the fixed frame and is fastened thereto by screws, the plate carrying a large boss which enters a recess in the frame. The movable member of the hinge comprises a leaf which penetrates the edge of the door and is formed with a screw-threaded hole engaged by a screw having a head which bears against the face of the door to clamp the leaf within the latter. Door fastenings. The free edge of the door is provided with projecting pins, which, when the door is closed, lie at the bottom of vertical slots provided in the fixed frame. When the door is raised by the lever, the pins are positioned opposite lateral openings formed at the upper ends of the slots, whereby the door may then be turned to the open position.